90164515 has 16 divisors (see below), whose sum is σ = 130928832. Its totient is φ = 58189824.

The previous prime is 90164497. The next prime is 90164521. The reversal of 90164515 is 51546109.

It is not a de Polignac number, because 90164515 - 2²³ = 81775907 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75174 + ... + 76363.

It is an arithmetic number, because the mean of its divisors is an integer number (8183052).

Almost surely, 2^90164515 is an apocalyptic number.

90164515 is a deficient number, since it is larger than the sum of its proper divisors (40764317).

90164515 is a wasteful number, since it uses less digits than its factorization.

90164515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151566.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 90164515 is about 9495.4997235533. The cubic root of 90164515 is about 448.4133670761.

It can be divided in two parts, 9016 and 4515, that added together give a palindrome (13531).

The spelling of 90164515 in words is "ninety million, one hundred sixty-four thousand, five hundred fifteen".